Multi-layered liner, a multi-layered product which includes the release liner and a method for making the release liner

Abstract

The invention relates to a manufacturing substrate of sheet-like products. The substrate comprises a paper layer ( 9 ) having a first surface and a second surface, a barrier layer ( 10 ) formed on the first surface of the paper layer ( 9 ), and a release layer ( 11 ) formed on the barrier layer ( 10 ). On the second surface of the paper layer ( 9 ) there is a non-stick layer ( 12 ). The invention relates also to a manufacturing method of the above-mentioned substrate, and a rebuilding method of a production line.

1. A roofing product including a roll of material, the product comprising:
 a paper layer having a grammage between 30 and 150 g/m 2  and having a first surface and a second surface; 
 a barrier layer formed on the first surface of the paper layer, the barrier layer comprising a polymeric film having a grammage between 10 and 30 g/m 2 ; 
 a release layer on the barrier layer, the release layer comprising a cured solvent-free silicone, and having a grammage between 0.5 and 1.5 g/m 2 ; 
 a layer of bituminous material on the release layer; 
 a plastic film layer partially covering the bituminous material; and, 
 a discontinuous non-stick cured silicone layer partially covering the second surface of the paper layer and arrayed as stripes on edge areas of the second surface of the paper layer, the non-stick layer having a grammage from 0.3 to 3.0 g/m 2 . 
 
     
     
       2. The roofing product according to  claim 1 , wherein the barrier layer comprises a sheet of polyolefin film. 
     
     
       3. The roofing product according to  claim 1 , wherein the paper layer is kraft paper. 
     
     
       4. The roofing product according to  claim 1 , wherein the barrier layer comprises polyethylene having a grammage between 10 and 30 g/m 2 . 
     
     
       5. The roofing product according to  claim 4 , wherein the polyethylene grammage is about 19 g/m 2 . 
     
     
       6. The roofing product according to  claim 1  wherein the release layer grammage is about 1 g/m 2 . 
     
     
       7. The roofing product according to  claim 1 , wherein the non-stick layer comprises an ultraviolet cured silicone. 
     
     
       8. The roofing product according to  claim 1 , wherein the non-stick layer grammage is about 1 g/m 2 . 
     
     
       9. The roof-covering sheeting material according to  claim 1 , wherein the non-stick layer comprises an ultraviolet cured silicone applied in a machine direction to the second surface of the paper layer. 
     
     
       10. A roofing product including a roll of material, the product comprising:
 a paper layer comprising kraft paper having a first surface and a second surface; 
 a barrier layer formed on the first surface of the paper layer, the barrier layer comprising a polymeric film; 
 a release layer on the barrier layer, the release layer comprising a cured solvent-free silicone, wherein the paper layer, the barrier layer and the release layer form a release liner; 
 a layer of bituminous material formed on the release liner; 
 a plastic film layer partially covering the bituminous material opposite the release liner; and 
 a discontinuous non-stick cured silicone layer partially covering the second surface of the paper layer and arrayed as stripes on edge areas of the second surface of the paper layer. 
 
     
     
       11. The roofing product according to  claim 10 , wherein the paper layer is a kraft paper having a grammage between 30 and 150 g/m 2 . 
     
     
       12. The roofing product according to  claim 10 , wherein the barrier layer comprises a polymeric film having a grammage between 10 and 30 g/m 2 . 
     
     
       13. The roofing product according to  claim 10 , wherein the release layer comprises a cured solvent-free silicone having a grammage between 0.5 and 1.5 g/m 2 . 
     
     
       14. The roofing product according to  claim 10 , wherein the non-stick layer comprises a cured silicone having a grammage from 0.3 to 3.0 g/m 2 .